:root {
  --bg: var(--tg-theme-bg-color, #f3efe6);
  --text: var(--tg-theme-text-color, #1d1a16);
  --card: var(--tg-theme-secondary-bg-color, #fffdf8);
  --accent: var(--tg-theme-button-color, #1f6b45);
  --accent-text: var(--tg-theme-button-text-color, #fff);
  --line: rgba(29, 26, 22, 0.12);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.4 "Iowan Old Style", Palatino, Georgia, serif;
  background: var(--bg);
  color: var(--text);
}
main { max-width: 40rem; margin: 0 auto; padding: 1rem; }
header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
h1 { font-size: 1.4rem; margin: 0; }
nav { display: flex; gap: 0.4rem; }
button, select, input {
  font: inherit;
  color: inherit;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  padding: 0.45rem 0.7rem;
}
button.tab.active, button.primary { background: var(--accent); color: var(--accent-text); border-color: transparent; }
button.danger { color: #8d2b2b; }
.card, form.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  padding: 0.8rem;
  margin: 0.7rem 0;
}
.card h2 { margin: 0 0 0.3rem; font-size: 1.05rem; }
.muted { color: rgba(29, 26, 22, 0.62); font-size: 0.92rem; }
.row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
input[type="text"] { flex: 1; min-width: 8rem; }
label.check { display: flex; gap: 0.4rem; align-items: center; }
pre {
  white-space: pre-wrap;
  word-break: break-all;
  background: rgba(29, 26, 22, 0.05);
  padding: 0.6rem;
  border-radius: 0.5rem;
  font: 0.78rem/1.35 ui-monospace, monospace;
}
canvas { width: 100%; height: auto; background: var(--card); border: 1px solid var(--line); border-radius: 0.8rem; }
#chart-note { min-height: 1.2rem; }